Indonesia Journey.Com from INDONESIA writes:
Puncak Jaya is one of the more demanding climbs in one version of the Seven Summits peak-bagging list. (It is replaced by Mount Kosciuszko in the other version).
Carstensz Pyramid (4,884 m) is the highest summit of Mount Carstensz in the Sudirman Range of the western central highlands of Papua province, Indonesia (within Puncak Jaya Regency). Other summits are East Carstensz Peak (4,808 m) and Ngga Pulu (4,863).Other names include Nemangkawi in the Amungkal language, Carstensz Toppen and Gunung Sukarno.
At 4,884 metres (16,024 ft) above sea level, Puncak Jaya is the highest mountain in Indonesia, the highest on the island of New Guinea (which comprises the Indonesian West Papua region plus Papua New Guinea), the highest of Oceania (Australia), and the 5th highest mountain in political Southeast Asia.
It is also the highest point between the Himalayas and the Andes, and the highest island peak in the world. Some sources claim Mount Wilhelm, 4,509 m (14,793 ft), as the highest mountain peak in Oceania, on account of Indonesia being part of Asia (Southeast Asia).
It is held to have the highest technical rating, though not the greatest physical demands of that list's ascents. The standard route is up the north face and along the summit ridge, which is all hard rock surface.
Despite the large mine, the area is highly inaccessible to hikers and the general public, requiring a 100-km hike from the nearest town with an airport, Timika, to the base camp, which usually takes about four or five days each way.